The creation of 561 was intended as a long-term solution. However, within only five years, 561 was close to exhaustion once again due to rapid growth in the Palm Beaches/Treasure Coast region and the proliferation of cell phones. The supply of numbers was further limited because all of South Florida from the Treasure Coast to the Florida Keys is a single LATA, meaning numbers in Miami's 305/786 and Fort Lauderdale's 954/754 weren't available for use. To solve the problem, in 2002 northern part of 561 (the Treasure Coast) became area code 772.